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Good amplifiers have low output impedances.

The reason is "impedance bridging".

Scroll down to related links and look at "Calculation the damping of impedance bridging or power matching an interface connecting Zout and Zin".

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15y ago

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Related Questions

How do you connect 4 ohm speaker to 16 output amplifier?

No Problem to do this, but there are really no amplifiers with an output impedance of 16 ohms on the market. All loudspeaker amplifiers have an impedance of less than 0.5 ohm. Scroll down to related links and look at "Impedance bridging - Wikipedia".


Will a 4 ohm sub work on a 8 ohm system?

With system you mean the output impedance of an amplifier. No Problem to do this, but there are really no amplifiers with an output impedance of 8 ohms on the market. All loudspeaker amplifiers have an impedance of less than 0.5 ohm. Scroll down to related links and look at "Impedance bridging - Wikipedia".


Why do amplifiers have a low output impedance?

To get all the audio voltage from a source to a target without loss you need voltage bridging, that is a relative low output impedance to a higher input impedance. Usualy the input impedance is at least ten times higher then the output impedance.An input impedance is called also a load impedance or an external impedance.An output impedance is called also a source impedance or an internal impedance.


If an amplifier has an output of 350 watts rms 8 ohms what is the output at 4 ohms?

There is no amplifier with an output impedance of 8 ohms or 4 ohms on the market. All audio amplifiers really have an output impedance of less than 0.1 ohms. Scroll down to related links and look at "Amplifiers, loudspeakers and ohms"


Does ideal amplifer has zero output impedance?

Yes


What are the importance of impedance matching in amplifiers?

Two reasons. 1...When impedance of source and destination match, power transfer is maximum. 2...If a long transmission line is involved, the characteristic impedance of the line must match the destination impedance, or reflections will occur on the line.


Can 8 ohm subs be used on 4 ohm amps?

No Problem to do this, but there are really no amplifiers with an output impedance of 4 ohms on the market. All loudspeaker amplifiers have an impedance of less than 0.5 ohm. Scroll down to related links and look at "Impedance bridging - Wikipedia".


What kind of desk to use for 8 ohm amplifiers?

The output impedance of a power amplifier is always less than 0.1 ohms. There are no 8 ohm amplifiers on the market!


How do you parallel 2 speaker 8 ohm on 8 ohm amply?

No Problem to do this, but there are really no amplifiers with an output impedance of 8 ohms on the market. All loudspeaker amplifiers have an impedance of less than 0.5 ohm. Scroll down to related links and look at "Impedance bridging - Wikipedia".


What are typical values of input impedance and outoput impedance of ce amplifiers?

Output of the power amplifier is smaller 0.1 ohms and input of the loudspeaker is more than 4 ohms.


What happens if you connect one 8 ohm speaker to an amp rated 350w at 4 ohm?

No Problem to do this, but there are really no amplifiers with an output impedance of 4 ohms on the market. All loudspeaker amplifiers have an impedance of less than 0.5 ohm. Scroll down to related links and look at "Impedance bridging - Wikipedia".


Is a voltage source a zero or infinite impedance?

Obviously it's not infinite impedance--that would mean it soaks up all the voltage. It can't be zero impedance either...that would be a superconductor, and there aren't many of those around. Voltage sources have impedance, but it's not infinite. Sometimes the impedance of the source is critical--radio frequency amplifiers have to be impedance matched to their transmitting antennas if you don't want to burn them out.

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